The Calendar hole will go live in approximately 7 days. Why not try and solve it ahead of time?
Leyland Numbers in Ruby in chars. Achievements Cheevos Holes Languages Medals Miscellaneous All Holes 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial All Languages ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Bytes Chars Scoring Bytes Chars Language All ><> Assembly AWK Bash BASIC Berry brainfuck C C# C++ Civet Clojure COBOL Coconut Common Lisp Crystal D Dart Elixir Erlang F# Factor Forth Fortran Gleam Go GolfScript Groovy Haskell Hexagony J Janet Java JavaScript jq Julia K Kotlin Lua Nim OCaml Pascal Perl PHP PowerShell Prolog Python R Raku Rockstar Ruby Rust Scheme sed SQL Swift Tcl TeX V VimL Wren Zig Experimental Language 05AB1E ALGOL 68 APL Arturo Befunge BQN CJam CoffeeScript Egel Fennel Harbour Hare Haxe Hush Hy iogii Knight Luau Odin Picat Qore Racket Rebol Rexx Scala Squirrel Stax Uiua Umka Vala Vyxal Hole All 12 Days of Christmas 24 Game 99 Bottles of Beer Abundant Numbers Abundant Numbers (Long) Arabic to Roman Arithmetic Numbers Arrows Ascending Primes ASCII Table Billiards brainfuck Card Number Validation Catalan Numbers Catalan’s Constant Christmas Trees Collatz CSS Colors Cubes Day of Week DFA Simulator Diamonds Divisors Emirp Numbers Emirp Numbers (Long) Emojify Evil Numbers Evil Numbers (Long) Factorial Factorisation Farey Sequence Fibonacci Fizz Buzz Foo Fizz Buzz Bar Forsyth–Edwards Notation Fractions Game of Life Gijswijt’s Sequence Happy Numbers Happy Numbers (Long) Hexdump Hilbert Curve Intersection Inventory Sequence ISBN Jacobi Symbol Kaprekar Numbers Kolakoski Constant Kolakoski Sequence Leap Years Levenshtein Distance Leyland Numbers ln 2 Look and Say Lucky Numbers Lucky Tickets Mahjong Mandelbrot Maze Medal Tally Minesweeper Morse Decoder Morse Encoder Musical Chords N Queens Niven Numbers Niven Numbers (Long) Number Spiral Odious Numbers Odious Numbers (Long) Ordinal Numbers PalindromemordnilaP Pangram Grep Partition Numbers Pascal’s Triangle Pernicious Numbers Pernicious Numbers (Long) Poker Polyominoes Prime Numbers Prime Numbers (Long) Proximity Grid QR Decoder Quine Recamán Repeating Decimals Reverse Polish Notation Reversi Rijndael S-box Rock-paper-scissors-Spock-lizard Roman to Arabic ROT13 Rule 110 Scrambled Sort Set Seven Segment SI Units Sierpiński Triangle Smith Numbers Spelling Numbers Star Wars GPT Star Wars Opening Crawl Sudoku Sudoku (Fill-in) Ten-pin Bowling Tic-tac-toe Time Distance Tongue-twisters Topological Sort Tower of Hanoi Transpose Sentence Trinomial Triangle United States Vampire Numbers Van Eck Sequence Zeckendorf Representation Zodiac Signs γ λ π τ φ √2 𝑒 Experimental Hole Apéry’s Constant Binary Lambda Calculus Calendar Connect Four Continued Fractions Crossword CSS Colors (Inverse) CSS Grid Ellipse Perimeters Flags Floyd-Steinberg Dithering Gray Code Decoder Gray Code Encoder Hexagonal Spiral Highly Composite Numbers Multitap Input NFA Simulator Numbrix Odd Polyomino Tiling p-adic Expansion Polygon Triangulations QR Encoder Quadratic Formula Semiprime Numbers Smooth Numbers Snake Sphenic Numbers Taxicab Numbers Turtle Tutorial # Golfer Points Chars Time Submitted 1st Lydxn 🇨🇦 1,000 44 42ms 19 Aug 2022 2nd pardouin 🇫🇷 898 49 37ms 17 Sep 2025 2nd radarek 🇵🇱 898 49 40ms 17 Sep 2025 4th janlelis 863 51 54ms 11 Nov 2021 5th m-tkach 🇺🇦 846 52 34ms 23 Aug 2023 6th Steffan153 🇫🇮 815 54 37ms 29 Aug 2024 6th sean-niemann 🇺🇸 815 54 35ms 12 Oct 2025 8th JayXon 🇺🇸 800 55 310ms 9 Jan 2022 8th MeWhenI 🇻🇦 800 55 40ms 16 Aug 2022 8th anter69 🇭🇺 800 55 36ms 25 Jan 2023 8th ovs-code 🇩🇪 800 55 40ms 22 Jan 2025 12th prplz 🇦🇺 786 56 64ms 28 Jul 2020 12th primo-ppcg 🇹🇭 786 56 155ms 15 Sep 2020 14th nwellnhof 🇩🇪 772 57 35ms 28 Oct 2021 14th GrayJoKing 🇦🇺 772 57 53ms 30 Nov 2023 14th DialFrost 🇸🇬 772 57 152ms 1 Jun 2024 17th olivermrose 🇺🇸 759 58 35ms 3 Oct 2021 17th stefangimmillaro 759 58 35ms 27 Oct 2021 17th SirBogman 🇺🇸 759 58 38ms 8 Jun 2022 17th sisyphus-ppcg 🇦🇺 759 58 37ms 11 Jul 2022 17th tatzyr 🇯🇵 759 58 43ms 24 Nov 2024 17th KatieLG 🇬🇧 759 58 33ms 2 Oct 2025 23rd hiddicop 🇸🇪 746 59 42ms 29 Jan 2021 23rd Shanethegamer 🇺🇸 746 59 38ms 16 Feb 2023 23rd BREMAUCY 🇫🇷 746 59 39ms 21 May 2023 23rd Natanaelel 🇸🇪 746 59 36ms 15 Jan 2024 23rd snoozingnewt 🇨🇦 746 59 37ms 2 Oct 2025 28th Andriamanitra 🇫🇮 733 60 40ms 26 Jul 2023 28th olleicua 🇺🇸 733 60 34ms 23 Apr 2025 30th akshatj27 🇦🇶 721 61 41ms 11 Jan 2022 30th orthoplex 🇨🇽 721 61 37ms 1 Apr 2022 30th OhmNomNom 721 61 36ms 14 Oct 2022 33rd emgordon154 710 62 37ms 13 Nov 2021 33rd jared-hughes 710 62 43ms 20 Sep 2022 35th Waffle3z 688 64 51ms 22 Jan 2021 36th FlyingPenguin223 667 66 37ms 11 Nov 2024 37th Lv0Sys 🇵🇱 657 67 37ms 20 days ago 38th dokutan 629 70 41ms 18 Apr 2025 39th adoxography 603 73 38ms 8 Oct 2020 39th lacrosse 603 73 33ms 26 days ago 39th TheZwierzLF 🇵🇱 603 73 34ms 3 days ago 42nd Irratix 🇳🇱 595 74 44ms 27 Jun 2022 43rd proton 🇩🇪 587 75 41ms 30 Oct 2020 43rd eggplants 🇯🇵 587 75 42ms 26 Nov 2020 43rd schachmattmatt 587 75 40ms 2 Oct 2021 43rd annaproxy 587 75 41ms 19 Sep 2023 47th fynnkroeger 524 84 46ms 8 Feb 2021 48th boxjelly 518 85 36ms 12 Feb 2021 49th nckraghu 512 86 34ms 29 Sep 2021 50th msbranicky 344 128 39ms 18 Oct 2023 51st HumanoidCPU 94 468 37ms 10 Jan 2025 52nd JRaspass 🇬🇧 49 891 33ms 12 Oct 2020 52nd jaredcrystal 🇺🇸 49 891 38ms 9 Dec 2020 52nd KatieLG-Transpiler 🇬🇧 49 891 38ms 24 Jun 2022 52nd retrohun 49 891 36ms 28 Dec 2022 52nd Haksell 🇦🇶 49 891 35ms 23 Feb 2023 52nd Mabeloid 🇳🇴 49 891 35ms 22 Sep 2024 52nd CaedenHarper 🇨🇦 49 891 35ms 16 Aug 2025 1–58 of 58